<html xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xd="http://www.oxygenxml.com/ns/doc/xsl" xmlns:cat="http://standards.iso.org/iso/19115/-3/cat/1.0" xmlns:lan="http://standards.iso.org/iso/19115/-3/lan/1.0" xmlns:gco="http://standards.iso.org/iso/19115/-3/gco/1.0" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><a name="top"></a><h1>Codelist Catalog</h1>
   <p>This report describes the ISO TC211 codelist catalogs, the codelists they contain, and the values and definitions of the codes.</p>
   <p> 
      Please contact <a href="mailto:rehabermann@me.com">Ted Habermann</a> if you have questions or suggestions.
   </p>
   <h2>Catalog</h2><b>Name: </b>Codelists from the Metadata with Schema Extensions (mex) Namespace<br/><b>Scope: </b>Codelists from the Metadata with Schema Extensions (mex) Namespace<br/><b>Field of application: </b>ISO TC211 Metadata Standards<br/><b>Version: </b>1.1<br/><b>Date: </b>2017-09-10<br/><b>Number of CodeLists: </b>2<br/><b>Number of items: </b>18
   <hr/>
   <h2>Codelists</h2><a href="MD_DatatypeCode"></a><h2>
                  MD_DatatypeCode
               : 
   </h2><b>Description: </b>
               datatype of element or entity
            <br/><b>CodeSpace: </b>http://standards.iso.org/iso/19115/-3/mex/1.0<br/><b>Number of items: </b>15
   <table width="95%" border="1" cellpadding="2" cellspacing="2">
      <tr>
         <th valign="top">Entry</th>
         <th valign="top">Definition</th>
      </tr>
      <tr>
         <td valign="top">
            class
            
         </td>
         <td valign="top">
            descriptor of a set of objects that share the same attributes, operations, methods, relationships, and behaviour
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            codelist
            
         </td>
         <td valign="top">
            flexible enumeration useful for expressing a long list of values, can be extended
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            enumeration
            
         </td>
         <td valign="top">
            data type whose instances form a list of named literal values, not extendable
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            codelistElement
            
         </td>
         <td valign="top">
            permissible value for a codelist or enumeration 
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            abstractClass
            
         </td>
         <td valign="top">
            class that cannot be directly instantiated
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            aggregateClass
            
         </td>
         <td valign="top">
            class that is composed of classes it is connected to by an aggregate relationship
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            specifiedClass
            
         </td>
         <td valign="top">
            subclass that may be substituted for its superclass
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            datatypeClass
            
         </td>
         <td valign="top">
            class with few or no operations whose primary purpose is to hold the abstract state of another class for transmittal, storage,
            encoding or persistent storage
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            interfaceClass
            
         </td>
         <td valign="top">
            named set of operations that characterize the behaviour of an element
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            unionClass
            
         </td>
         <td valign="top">
            class describing a selection of one of the specified types
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            metaClass
            
         </td>
         <td valign="top">
            class whose instances are classes
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            typeClass
            
         </td>
         <td valign="top">
            class used for specification of a domain of instances (objects), together with the operations applicable to the objects. A
            type may have attributes and associations
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            characterString
            
         </td>
         <td valign="top">
            textual information
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            integer
            
         </td>
         <td valign="top">
            numerical field
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            association
            
         </td>
         <td valign="top">
            semantic relationship between two classes that involves connections among their instances
            
         </td>
      </tr>
   </table><a href="#top">top</a><a href="MD_ObligationCode"></a><h2>
                  MD_ObligationCode
               : 
   </h2><b>Description: </b>
               obligation of the element or entity
            <br/><b>CodeSpace: </b>http://standards.iso.org/iso/19115/-3/mex/1.0<br/><b>Number of items: </b>3
   <table width="95%" border="1" cellpadding="2" cellspacing="2">
      <tr>
         <th valign="top">Entry</th>
         <th valign="top">Definition</th>
      </tr>
      <tr>
         <td valign="top">
            mandatory
            
         </td>
         <td valign="top">
            element is always required
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            optional
            
         </td>
         <td valign="top">
            element is not required
            
         </td>
      </tr>
      <tr>
         <td valign="top">
            conditional
            
         </td>
         <td valign="top">
            element is required when a specific condition is met
            
         </td>
      </tr>
   </table><a href="#top">top</a><hr/><i>Stylesheet: CT_CodelistHTML.xsl Version: 2017-09-10</i></html>